Column.



No. 888,114. PATENTED MAY 19, 1908.

I. W. NUMAN.

COLUMN.

APPLIOATION FILED MAY 15.1907.

WW I x??? x I gw/vwutov I tofore it has been necessary to employ a sup-.any desired size, reference being had to the UNITED sTArasra ENToruuon.

ISAAC W. NUMAN,

To all whom "it may concern:

Be it known that I, ISAAC W. NUMAN, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented certain new and useful Improvements in Columns, of which thefollowing is a specification.

The object of the present invention is to produce a column from sheetmetal and so shape the column or shell thereof, that it will have thedesired amount of stren th to carry the weight designed to be carriedd ybuilding columns.- This object I accomplish by the novel formationhereinafter. described and particularly pointed out in the claims.

Like numerals refer to the same parts in the several figures of thedrawing, in which- 7 Figure 1 is a view showing the shaft, base,

and capital placed in proper relative position with-reference to eachother. Fig. 2 is a detached perspective view of the column shaft. Fig. 31s a similar view showing a straight shaft. Fig. 4 is a transversesection on line 44, Fig.

In the accompanying drawing, 1 represents the shaft or column proper,which may be of particular use designed and to the place in the buildinglocated. The shaft 1 is preferably formed cylindrical in crosssectionand may be strai ht or tapered as desired; Hereport other than thecolumn shaft, which support has been located within the shaft. Mymvention is of such a nature that a sheet metal shaft'can be producedhaving the desired strength to carry the weight usually carried by theinner support. In other words the shaft is so formed that a selfsupporting shaft is produced. 1

So far as I am aware sheet metal columns have been formed by simplyalternating the corrugations, which alternating corrugations do notproduce a column shaft adapted to withstand pressure without danger ofbuckling and in some instances bending or spring ing. The shaft 1 isprovided with a series of longitudinal conveXo-concave integral sections2','which conveXo-concave sections are separated by the outward extendedintegral ribs 3, which ribs are formed of much less width than the widthof the conveXo-concave I portion, but I do not desire to be confined toI Specification of Letters Patent.

Application filed May 15, 1907.

OF-CANTON, OHIO, ASSIGNOR TO THE UNION METAL POST COMPANY, OF

CANTON, OHIO, A CORPORATION OF OHIO.

Patented May 19, 1908.

Serial No. 373,869.

any specific width of either the conveXo-concave or the ridge portionsas the object above pointed out can be carried out by forming the outerportions or ribs of a different shape from the inner convexo-concaveportion, thereby providing two distinct and .difierent formations sothat the inner and outer portions will brace each other in a differentdirection that is to say the cnvexo-Conizave portions will be braced bythe differently shaped ridges and the different shaped ridges wil bebraced by the conveXo-concave portions to a muclrgreater extent than theordinary oppositely curved or corrugated column such as areof commonconstruction in conductor pipe and in columns wherein a center supportis provided.

In the formationof sheet metal columns the metal must be originallyformed in plain sheets of re uired thickness for the purpose intendedan( the sheets given the cylindrical form and the longitudinalalternating ridges and the convexo-concave portions and in order toproduce a column having the desired amount of strength to support andcarry the weight intended it is of importance to so shape the shell thatno springing or buckling will be produced when pressure isbrought tobear upon the column or the shaft of the column.

The edges of the column are either welded or seamed together butpreferably a common locked seam isemployed, but'this feature forms noparticular part of the present tended from the top to the bottom of thecolumn.

It will be understood that by forming the column tapered and alsoforming the con- .veXo-concave flutes .or corrugations tapered a verystrong structure is provided by which thin sheetmetal can be employedwhile heretofore it has been necessary to employ heavy material ormaterial formed from cast metal .or heavy wrought.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. As an improved article of manufacture,

a column formed of sheet metal and tapered 2 sesame -from its bottom orbase toward its top, conflutes tapered, substantially as and for thevexo-concave flutes tapered from their botpurpose specified.

torn or lower ends toward their top or upper In testimony that I claimthe above,l have ends, and extended intermediate ridges,- sub' hereuntosubscribed my name in the presence 5 stantially as and for the purposespecified. of two witnesses.

2. As an improved article of manufacture a column formed of sheet metal,the shell of, ISAAC said column formed of sheet metal and said.Witnesses:

shell consisting of alternating conveXo-cony J. A. JEFFERS, -0 caveflutes and ridges, sald convexo-concave l 1F. W. BOND.

